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Adbanced Numerical Simulation of Compressible Two-phase Flow of diesel atomization

JAXA Supercomputer System Annual Report April 2017-March 2018

Report Number: R17ECMP04

Subject Category: Competitive Funding

PDF available here

  • Responsible Representative: Takuji Kurotaki, Aeronautical Technology Directorate, Numerical Simulation Research Unit
  • Contact Information: Takuji Kurotraki kurotaki@chofu.jaxa.jp
  • Members: Takuji Kurotaki

Abstract

Atomization of fuel of aeronautical engines is focused in because of fuel consumption and environmental issues. Information from CFD results is very helpful for solutions of them. The research of numerical simulation of compressible muti fluid flow is conducted to apply for these problems.

Reference URL

N/A

Reasons for using JSS2

Super computer system can be used from simple problems for the validation of basic method to relatively large application for unsteady and multi dimensional problems. It is convenient for the speed up of development of numerical cord.

This kinds of simulation deal with unsteady problems and in order for the reduction of computational time, the ability of handling of parallel computing is indispensable.

Achievements of the Year

Two main approach to the simulation of compressible multiphase flow are investigated; diffuse interface approach which treats the interface as mixture of both fluids and sharp interface approach with levelset method.

In the development of diffuse interface approach, basic equations are extended to six equation model and by considering the chemical equilibrium it became to possible to treat phase change such as cavitation. Atomization of fuel from 2D nozzle is simurated by this chords.

In the development of sharp interface approach, new HLLC scheme which is extended to treat phase change models at the interface and it was confirmed that the problem of the cavitation collapse are simulated accurately and the methods to inprove the mass prezervation was investigated.

Annual Reoprt Figures for 2017

Fig.1: Volume fraction of fuel and numerical Schlieren

 

Annual Reoprt Figures for 2017

Fig.2: Volume fraction of vapor of fuel and air

 

Publications

■ Presentations

1) Sumi, Kurotaki,' Ubsteady Numerical Simulation of Compressible Gas-Liquid Two-Phase Flow for Ultra-High-Pressure Fuel Injection,'The 28th Internal Conbustion Symposium (2017), 13.

Usage of JSS2

Computational Information

  • Process Parallelization Methods: N/A
  • Thread Parallelization Methods: OpenMP
  • Number of Processes: 1
  • Elapsed Time per Case: 10.00 hours

Resources Used

 

Fraction of Usage in Total Resources*1(%): 0.00

 

Details

Please refer to System Configuration of JSS2 for the system configuration and major specifications of JSS2.

Computational Resources
System Name Amount of Core Time
(core x hours)
Fraction of Usage*2(%)
SORA-MA 0.00 0.00
SORA-PP 4,466.74 0.06
SORA-LM 0.00 0.00
SORA-TPP 0.00 0.00

 

File System Resources
File System Name Storage Assigned
(GiB)
Fraction of Usage*2(%)
/home 005.09 0.00
/data 078.01 0.00
/ltmp 1,041.67 0.08

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 0.00 0.00

*1: Fraction of Usage in Total Resources: Weighted average of three resource types (Computing, File System, and Archiver).

*2: Fraction of Usage:Percentage of usage relative to each resource used in one year.

JAXA Supercomputer System Annual Report April 2017-March 2018


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Language / 言語

"Annual Report" available

How to use JSS3

To use JSS3, please refer to "How to use JSS3" page .

Location

Chofu Aerospace Center
7-44-1 Jindaiji Higashi-machi, Chofu-shi, Tokyo